Hello Nicolas,
While I have never made a purchase from WindPowerSports, I have met Corey Jensen when he was an announcer in years past at WSIKF (Washington State International Kite Festival). Corey has been involved in kiting for over 20 years and in kite sales for at least 7 years to my knowledge. From what I know of him, I would consider him highly reputable, and no, I'm not saying this because we share the same last name!
Sit tight, I think Corey's email was totally sincere and honest.
Ed Jensen